Keep source plugins in single scraper process

docs/scraper-service.md

@@ -5,31 +5,23 @@ It owns the durable queue and is the only process allowed to run a queued archiv
 The browser never contacts it directly: authenticated admin routes in `server.js`
 proxy commands to its private HTTP API.
 
-## First-party source parser pilot
+## In-process source modules
 
-The WeebCentral and MangaDex parsers have reviewed first-party modules in
-`scraper/plugins/`. By default their existing in-process paths remain in use.
-To test process isolation in Compose, start the `source-plugins` profile and
-set `SOURCE_PLUGIN_URL=http://source-plugin-weebcentral:8094` and/or
-`MANGADEX_PLUGIN_URL=http://source-plugin-mangadex:8094` for the scraper.
-Each URL selects its source independently. A selected worker that is unavailable
-causes that source's discovery to fail closed and retain its checkpoint. Remove
-its URL to roll back. Do not restart a live scraper merely to try this option;
-use the normal checkpoint-safe deployment procedure.
+There is one scraper daemon/container and one durable queue. WeebCentral and
+MangaDex source modules are registered explicitly in `scraper/adapters/index.js`.
+Their descriptors live in `scraper/sources/`; they call source-specific catalog
+and archive code in the same process. Pure parsing functions in
+`scraper/plugins/` handle source page/API shapes. No source parser has a separate
+container, HTTP endpoint, runtime download, or independent queue. Only reviewed
+first-party modules ship in the image; Uchiyomi packages are not executed.
 
-Each worker has no published port, egress network, library/data mount, or token.
-Only the existing rate-limited scraper HTTP client fetches remote HTML/images.
-The worker accepts bounded HTML for four parsing steps over its internal-only
-network. It loads only modules listed in the static first-party registry; there
-is no runtime plugin download or execution of Uchiyomi packages. This is a
-parser-isolation pilot, **not yet** a complete generic source-plugin contract
-or migration of either archive runner. Parsed catalog and image URLs are checked
-before use, and parser requests/responses are size-bounded. When the worker is
-enabled, WeebCentral requests use a pinned-DNS HTTPS transport that validates
-each redirect and stops on access errors; the ordinary in-process path is not
-changed. Public image hosts are not yet restricted to a reviewed CDN allowlist.
-Keep the profile off in production until a separate deployment validation is
-completed.
+The scraper's paced HTTP client fetches source content. Parsing is an ordinary
+function call. The registry checks source URLs and validates parsed output before
+the scraper follows links. WeebCentral catalog requests use a pinned-DNS HTTPS
+transport that validates redirects and stops on access errors. Image hosts are
+not restricted to a reviewed CDN allowlist yet. Existing queue state, source
+delays, chapter delays, and partial-download checkpoints are unchanged by this
+code organization. See [adding a source](source-modules.md) for the full path.
 
 ## Start and storage
 
@@ -218,7 +210,7 @@ the shared token.
 
 ## Adapter contract
 
-Each source plugin is registered in `scraper/adapters/index.js` with:
+Each first-party source module is registered in `scraper/adapters/index.js` with:
 
 ```js
 {